The same routed length can have a different phaseUniform-line sensitivity: t = L√εeff/c. At 50 mm and 10 GHz, changing εeff from 2.7 to 2.9 changes phase by approximately 35.9 degrees.The same routed length can have a different phaseIllustrative effective permittivity values; no Arlon grade is represented.A: εeff = 2.7B: εeff = 2.950 mm at 10 GHz → about 35.9° additional lag in B³Ô¹Ïtv engineering illustration · not a production record · not to scale